Lathe-tool holder



, Oct. 5 1926.

J. D. BOWEN LATHE TOOL HOLDER Fil'ecwneo. '1e 2 sheets-sheet 1 INVENTOR ATTORNEYS oct. 5 .1926. 1,602,330 J. D. BOWEN LATHE TOOL HOLDER s Filed Dec. 1e, 1924 2 sneessheet 2 INVENTOR l John D owen ATTORNEYS Patented 5, 1925.

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LATER-TOOL, .IOLDEi-Pi.

Application filed December 16, .19241. .Serial No. 755,286.

My invention relates to a combination tool holder for use in lathe work and particularly to a tool holder-especially useful as a tol# lower and lead rest for turning and chasing threads on long pieces of small diameter work having vas .vell means adapting the holder 'for vholding a boring or a turning tool and comprising also an attachment for centering and steadying vthe drill andthe werk in drilling.

rEhe general object of my invention'is to provide an etlicient combination tool holder as indicated and characterized by the facility withwhich it may be employedwior its various functions and by eiliciency in holding the ditierent tools7 centering the drill, ,and steadying or centering `the work.

The nature or my invention and its distinguishing features and' advantages will clearly appear asv the description proceeds.

Reference is to be had to the accompanying drawings toi-ming a part ot this specification, it being understood that the drawings are merely illustrative ot one example ot the invention. i

Figure 1 is a side elevation of a' lathe-v tool holder embodying my invention, the view indicating in dot-and-dash lines a trag-l ment of the lathe-tool post;

Figure 2 is a plan view of `the lathe-tool holder with a fragment of the lathe-tool post indicated in dot-anddash lines;

Figure 3 is an end view of the tool holder,

the view being taken at that end of the tool shown at the right of Figures 1 and 2;

Figure 4 is a detail 1n transverse'vertical section as indicated by the line 41E-4 of Figure l;

Figure 5 is a fragmentary elevation showing that end of the tool holder at the right of Figures 1 and 2 as used for holding a boring tool;

Figure 6 is a plan view ot that end orn the holder shown at the lett or' Figures 1 and 2 and illustrating the use of the attachments at said end for steadying a drill and the work being drilled;

Figure 7 is a side elevation of the work holding attachment .shown in plan in Figure 6;

Figure S is an end view of thel attachment shown in side elevation in Figure 7.

In carrying out my invention in accordance with the illustrated example, a bar 10 )said carrier slide.

is provided Vhavingfalongan edge 'thereof a depression 11 Yformed with steps 12, :as `seen in Figure 4 to accommodate tools ,otdiierent sizes; A, the tool holder beingemployed inuthis instance. asa tolloweriand leadrest for turning :and .chasing threads on. :a long piece of worlt B Vof small diameter. InFigure, the boring bar() is held on seats 112.101 acting on i a Vpiece ot' Werl; Dto be ,.bored. .In Figures 1. and 12. there is indicated vin dot-and-dash lines kat 13 a fragment of'a. lathe-tool post and on clamping the bar 10:'insaid'tool ,post

.1n Figure .1 is shown a tool bit a plate 14 is employed -as ,a vpad totake the clamping .action of the screw otl v lthe lathetool post. The bar 10 is provid-ed tadjacent to one vend withits .own post 15 through which .the 4bit A, 'bor-ingibafr v@,or the like, extends, said post having a clamp Ascrew 16 to hold theV bit .or v,bar zi-ngplace-onits parfv tisular seat '12 accord-ing to fthe sizeuotffthe bit or .boringbar. The post 15,-isfforlted ,at its lower .en-d so that the sides thereof lie at the outer sides of the ,bar l0 and .saidsides are made rigid with the bar 10 by any suitable means such as rivets 115. Beyond ank end of the bar 10 is positioned a steady rest slide 17 which is vertically the front and back of said slide 18. A milled head 24: is provided on the screw for turning the same, whereby t0 cause the slide 18 to carry the steady rest slide 17 toward or from the bit A. The steady rest slide 17 has an extension l117 to overlie the piece of Work B while the main shank or body of said steady rest slide forms a backing for the work to resist the pressure of the vbit A.

A vertical adjustment orn the slide is provided by a vertical slot 25 in saidslide through which extends a clamp screw 26. To hold the carrier slide 18 in adjusted position with the steady rest slide 17 engaging thework B a set screw 27 is em-A ployed on the post 15 at each side thereof to bind against the respective bars19 of Y At the opposite end of the fool from that a Lacasse provided With the tool post 15, l provide attachments to hear against and center a piece oi- Work being` drilled as Well as lan eleinent to hear against the center of the drill. ln Figure 6 is indicated conventionally a piece of Work E to be drilled and at F the drill is indicated. A Work centering,` attachment 28 is formed with a V-shaped recess 29 to hear against the Work E. Said attachment 23 is disposed as an extension oit' the adjacent end of the 1oar l0 and is orined with a shank 30 having a hole 3l through which a binding screu1 32 extends, the shank 30 losing; received in an end slot 33 in har l0. lirectly alongside the Werl: centering` eze tension 23, l provide a drill centering elenient 3e which has a slot 35 therein and it is provided with a button or a linger-hold 36 Vfor sliding),l the element` 34e on the loar l0.

A set screw 3'? passing into the side of the bar through the slot 25 of slide element 35 serves to loind said element in position. The front end of the element 34 is formed with a l-shaped recess 38 so that said elenient binds against the drill F adjacent the point of convergence of the sloping` sides ott said recess 33.'

l would state in conclusion that While the illustrated example constitutes a practical einhodiinent of rny invention, l do not liinit myself strictly tothe exact details herein illustrated, since, manifestly, the saine can he considerably varied Without departure from the spirit of the invention as delined in the appended claims.

Jlaying thus described iny invention, l claim:

l. ln a tool holder, an elongated har adapted to he clampedr in the tool posto'f a lathe, said har having a grooved edge formed With various seats to accoinrnodate tools of various sizes, a tool post on said bar through which a tool inay pass when disposed on a seat in said groove, and ineans on said second-mentioned post to clanip the tool to its seat inV said groove, together with a steady rest slide, and a. carrier slide adjustable longitudinally of the har and mounting` said steady rest slide, said steady rest slide being adjustable onV the carrier slide directly transversely to the said har in addition to being; constrained to inove tovvard or roni the har With the inovenients of said carrier slide.

2. A tool holder of the class described, including' an elongated har adapted to he clamped on the tool post of a lathe and ai Jording` a seat for a tool, means to clainp the tool to its seat, carrier slide having` side hars adjustahly engaging theV sides of said har., a screw extending` through said carrier slide and into said loar 'for causing` the said slide to niove toward or from the carrier bar,'and a steady rest slide disposed on said carrier slide and adapted to engage a piece of Work, saidfstead-y rest slide adjustable ransversely to the carrier slide and to said JOHN DAVlD BOEN. 

